HDU 5884 Sort -2016 ICPC 青岛赛区网络赛

题目链接

#include <iostream>
#include <math.h>
#include <stdio.h>
#include<algorithm>
#include<cstring>
#include<queue>
using namespace std;
int data[100005];
int main()
{
    int T,n,t;
    scanf("%d",&T);
    while(T--) {
        int tmp;
        scanf("%d%d",&n,&t);
        for(int i=0;i<n;i++) {
            scanf("%d",&data[i]);
        }
        sort(data,data+n);
        int l=2,r=n;
        while(l<r) {
            int mid=(l+r)/2;
            int i = 0;
            while (data[i]==0 && i<n) i++;
            long long ansT = 0, pos = 0;
            queue<int> que;
            i--;
            if(i==-1) i=0;
            int tmp = (n-i-1)%(mid-1);
            if (tmp) {
                tmp++;
                while (tmp--) pos += data[i++];
                que.push(pos);
                ansT += pos;
            }

            while (i<n||que.size() > 1) {
                pos = 0;
                for (int j = 0; j < mid; j++) {
                    if (i == n && que.empty()) break;
                    if (que.empty()) {
                        pos += data[i++];
                        continue;
                    }
                    else if (i == n) {
                        pos += que.front();
                        que.pop();
                        continue;
                    }
                    else if (data[i] < que.front()) {
                        pos += data[i++];
                    }
                    else {
                        pos += que.front();
                        que.pop();
                    }
                }
                ansT += pos;
                que.push(pos);
            }
            if(ansT<=t) r=mid;
            else l=mid+1;
        }
        printf("%d\n",l);
        //printf("%d\n",r);
    }
    return 0;
}
/*
100

3 3
1 2 4
1 2
2 3
3 1

*/